AI agents call list_audio_versions to retrieve information from FHL Bible MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple listing or query operation to retrieve information about available audio Bible versions. It has no side effects, does not execute code, does not modify data, and does not involve financial transactions. It is a read-only information retrieval tool consistent with other tools on the server that provide access to Bible study resources.
From the tool's definition Tool name 'list_audio_versions' and description '列出所有可用的有聲聖經版本' (list all available audio Bible versions) indicate a query/enumeration operation that retrieves metadata about available audio Bible versions without modifying, executing, or deleting any data.
Documented attack patterns abuse exactly the kind of access list_audio_versions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and FHL Bible MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_audio_versions:
{
"version": "1",
"default": "deny",
"tools": {
"list_audio_versions": {}
}
}list_audio_versions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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列出所有可用的有聲聖經版本。. It is categorised as a Read tool in the FHL Bible MCP Server MCP Server, which means it retrieves data without modifying state.
Register the FHL Bible MCP Server MCP server in PolicyLayer and add a rule for list_audio_versions: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches FHL Bible MCP Server. Nothing to install.
list_audio_versions is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_audio_versions rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list_audio_versions. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list_audio_versions is provided by the FHL Bible MCP Server MCP server (ytssamuel/fhl-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from FHL Bible MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
56 FHL Bible MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.